BR112019011040A2 - composition, method of inhibition, and use of the composition. - Google Patents

Abstract

It is a composition for inhibiting corrosion and / or removing hydrocarbon deposits in oil and gas applications. The composition comprises an iron sulfide dissolvent, an organic solvent and a corrosion inhibitor.

Description

COMPOSITION, INHIBITION METHOD, AND, USE OF COMPOSITION

FIELD OF THE INVENTION [001] Cleaning agent / corrosion inhibitor compositions are provided, and more particularly compositions for removing deposits based on oilfield hydrocarbon and iron sulfide from equipment and to provide protection of equipment against corrosive fluids and gases .

BACKGROUND OF THE INVENTION [002] As the oil fields age, the amount of oil produced decreases and the amount of water produced with the oil increases. This water is normally discarded or injected back into the formation to maintain the reservoir pressure. The separation process is efficient, but not perfect, and a small fraction of oil and other debris may be present after the fluids have passed through the separation equipment. This residual fraction of oil in the water carrier can cause significant problems as the field ages. The fields can produce up to 1,000,000 barrels of water per day. Residual oil and other particles, such as paraffin, asphaltenes, iron sulfide and biomass can accumulate in the equipment and separation piping. This form of deposition is referred to in the industry as schmoo. If left untreated, this form of deposition can obstruct the lines, which can lead to loss of revenue and / or equipment failure and, in addition, can result in casualties. Due to the lines that cannot be mechanically cleaned, a chemical solution that can be injected into the system is necessary to keep track of deposition in the lines.

[003] Fluids produced in the oil and gas industry can be quite corrosive to the infrastructure for which they are produced. This internal corrosion of pipes and production equipment is commonly treated with chemical corrosion inhibitors. Corrosion inhibitors

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2/40 work mainly by forming protective films on the infrastructure surfaces. This creates a protective barrier against corrosive fluids. If the deposition of schmoo described above is present on the internal surfaces, it will not allow the dosed corrosion inhibitor to be revised and effectively protect the equipment.

[004] Schmoo is a complex mixture of inorganic compounds, such as sand and iron sulfide, and organic compounds, such as asphaltenes and crude oil. The control and prevention of schmoo are difficult. Schmoo deposits are sticky and difficult to clean, particularly near welds. Currently, commercially available cleaning products to remove schmoo from equipment used in oil and gas applications help remove organic deposition, but are less effective against inorganic deposition, especially iron sulfide. Conventional cleaning products can disperse iron sulphide, but are relatively ineffective in inhibiting or dissolving iron sulphide, providing only limited cleaning capacity. Conventional cleaning products can also be acidic and therefore incompatible with the metallurgy of systems designed for treatment.

[005] What is needed is a means of chemically removing and preventing the schmoo from settling on the internal surfaces of the production equipment, while inhibiting corrosion to help maintain the integrity of the equipment.

BRIEF SUMMARY OF THE INVENTION [006] A composition is provided to inhibit corrosion and / or remove hydrocarbon deposits in oil and gas applications. The composition comprises an iron sulfide dissolver, an organic solvent and a corrosion inhibitor. The iron sulfide dissolver comprises allaric acid, altaric acid, altraric acid, altronic acid, arabinaric acid, arabinonic acid, dihomocitric acid, fructuronic acid,

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3/40 fuconic acid, galactaric acid, galactonic acid, galacturonic acid, glucaric acid, glycoheptonic acid, gluconic acid, glucuronic acid, gulonic acid, homocitric acid, homoisocitric acid, idaric acid, idonic acid, iduronic acid, isocitric acid, mannaric acid , mannonic acid, octulosonic acid, ramnonic acid, ribonic acid, tagaturonic acid, xylonic acid or xyluronic acid, or a salt or derivative thereof, or a combination of these. Preferably, the iron sulfide dissolver comprises gluconic acid or a salt thereof, glycolic acid or a salt or derivative thereof, or a combination thereof. More preferably, the iron sulfide dissolver comprises sodium gluconate, ammonium gluconate, potassium gluconate, lithium gluconate, magnesium gluconate, calcium gluconate, cesium gluconate, gluconic acid, sodium glucarate, ammonium glucarate, glucarate potassium, lithium glucarate, magnesium glucarate, calcium glucarate, cesium glucarate, glucaric acid or a combination of these.

[007] Derivatives of the acids described above can be, for example, aldehyde, dehydrated, deoxy, erythro, keto, lower alkyl (for example, methyl, ethyl, propyl), oxo or threo, of the acid or its salt.

[008] Preferably, the organic solvent comprises an alcohol, a hydrocarbon, a ketone, an ether, an alkylene glycol, a glycol ether, an amide, a nitrile, a sulfoxide, an ester, a polyol, or a combination of the same. For example, the organic solvent can comprise methanol, ethanol, propanol, isopropanol, butanol, 2-ethylhexanol, hexanol, octanol, decanol, 2-butoxyethanol, methylene glycol, ethylene glycol, 1,2propylene glycol, 1,3-propylene glycol, ether diethylene glycol monomethyl, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, pentane, hexane, cyclohexane, methylcyclohexane, heptane, dean, dodecane, diesel, toluene, xylene, heavy, naphtha, heavy oxane, naphtha, heavy metal, naphtha, heavy duty diisobutyl ketone, diethyl ether, propylene carbonate, N

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4/40 methylpyrrolidinone, Ν, Ν-dimethylformamide, glycerin, or a combination thereof.

[009]

The composition can comprise water as an additional solvent.

[0010]

The corrosion inhibitor can comprise an imidazoline compound, a quaternary ammonium compound, a pyridinium compound or a combination thereof. Preferably, the corrosion inhibitor comprises one or more of the following imidazoline compounds:

(A) an imidazoline of Formula (I):

R ¹² R ¹¹

Not even if

R ¹⁰ is a C1-C20 alkyl or C1-C20, alkoxyalkyl group;

R ¹² and R ¹³ are, independently, hydrogen or a C _1-6 alkyl group,

R ¹¹ and R ^{14 are} independently hydrogen, C 1 -C 6 alkyl, C

C ₆ hydroxyalkyl, or Ci-Có, arylalkyl; and

X 'is a halide, carbonate, sulfonate, phosphate or an anion of an organic carboxylic acid;

or a tautomer thereof;

(B) an imidazolinium salt of formula (II):

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R ¹⁴ (Π) where

R ¹⁰ is a C1-C20 alkyl or C1-C20, alkoxyalkyl group;

R ¹² and R ¹³ are, independently, hydrogen or a C _1-6 alkyl group,

R ¹¹ and R ^{14 are} independently hydrogen, C 1 -C ₆ alkyl, C ₁ -C ₆ hydroxyalkyl, or C 1 -C ₆ , arylalkyl; and

X 'is a halide, carbonate, sulfonate, phosphate or an anion of an organic carboxylic acid;

or a tautomer thereof;

(C) a bisquaternized imidazoline compound of Formula (III):

(CH ₂ ) _y (III) where:

R1 and R2 are each, independently, alkyl or alkenyl of unsubstituted branched chain or ring, having from 1 to about 29 carbon atoms; alkyl or alkenyl, chain, ring or branched, partially or completely oxygenated, sulfurized and / or phosphorylated, having from 1 to about 29 carbon atoms; or a combination of these;

R3 and R4 are each, independently, alkylene or

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6/40 unsubstituted branched ring or alkenylene having 1 to about 29 carbon atoms; alkylene or alkenylene, chain, ring or branched, partially or completely oxygenated, sulfurized and / or phosphorylated, having from 1 to about 29 carbon atoms; or a combination of these;

Li and L2 are each independently absent or are H, COOH, -SO3H, -PO3H2, -COOR5, -CONH2, -CONHR5, or -CON (R ₅ ) ₂ ;

R5 each independently represents a branched or unbranched alkyl group, aryl, alkylaryl, alkylheteroaryl, cycloalkyl, or heteroaryl group having from 1 to about 10 carbon atoms;

n is 0 or 1, and when n is 0, L2 is absent or is H;

x is from 1 to about 10; and y is from 1 to about 5; or (D) a combination thereof.

Preferably, the corrosion inhibitor comprises a quaternary ammonium compound of Formula (IV):

R ₂ x®

I ©

R -, ----- N ----- R ₃ r ₄ (IV)

R1, R2, and R3 are, independently, C1 to C20, alkyl, R4 is methyl or benzyl and X is a halide or methosulfate.

[0011] Preferably, the corrosion inhibitor does not include a phosphate ester.

[0012] A method is provided to inhibit corrosion on a surface and / or remove hydrocarbon deposits from a surface. The method comprises the addition of an iron sulfide dissolver to a fluid that comes in contact with a surface of a well or equipment

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7/40 used in the production, processing, transport, storage or separation of the fluid to inhibit corrosion and / or remove hydrocarbon deposits from the surface. The iron sulfide dissolver comprises sodium gluconate, ammonium gluconate, potassium gluconate, lithium gluconate, magnesium gluconate, calcium gluconate, cesium gluconate, gluconic acid, sodium glucarate, ammonium glucarate, potassium glucarate, lithium glucarate, magnesium glucarate, calcium glucarate, cesium glucarate, glucaric acid or a combination of these. The fluid comprises natural gas or a liquid hydrocarbon.

[0013] A method is provided to inhibit corrosion on a surface and / or remove hydrocarbon deposits from a surface. The method comprises adding a composition as described above to a fluid that contacts a surface of a well or equipment used in the production, processing, transportation, storage or separation of the fluid to inhibit corrosion and / or remove hydrocarbon deposits at from the surface. The fluid comprises natural gas or a liquid hydrocarbon.

[0014] The equipment comprises a pipe, a storage container, an injection pipe inside a well, a flow line or an injection line.

[0015] Liquid hydrocarbon comprises crude oil, heavy oil, processed residual oil, bituminous oil, coking oil, diesel, fluid catalytic cracking or mud, naphtha, diesel fuel, fuel oil, aviation fuel, gasoline or kerosene.

[0016] Other objectives and resources will be partly evident and partly highlighted below.

BRIEF DESCRIPTION OF THE DRAWINGS [0017] Figure 1 is a graph of the corrosion rate versus time in a bubble test and shows the corrosivity of sodium gluconate (- + - 37,000

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8/40 ppm; -X- 10,000 ppm and -o- 1,000 ppm)) compared to THPS (- At 37,000 ppm; 10,000 ppm, and 1,000 ppm)) in a brine solution in equivalent doses;

Figure 2 is a graph of the corrosion rate versus time in a bubble test to show the effect of a sodium gluconate formulation (-) on the corrosion performance compared to an incident material containing THPS (-A-); and

Figure 3 is a graph of the concentration of solubilized iron versus total treatment (% by weight of iron sulfide dissolver) in an iron sulfide solubilization test to show the effect of a corrosion inhibitor including 25% sodium gluconate (- · -) dissolving iron sulfide compared to the same material including 25% THPS (-A-); corrosion inhibitor control (-).

DETAILED DESCRIPTION OF THE INVENTION [0018] Cleaning agent / corrosion inhibitor compositions, methods of using said compositions and processes for their preparation are disclosed herein. The compositions are useful in products based on crude oil and based on natural gas, processes and refinery flows. The described compositions are particularly effective for inhibiting corrosion of mild steel in hydrocarbons, oil / brine mixtures and aqueous systems. The compositions are also particularly useful for removing hydrocarbon deposits (eg, schmoo) from metal or mineral surfaces in contact with a fluid in oil and gas applications, including removal of iron sulfide to reduce the risk of corrosion failures due to corrosion under deposit. The compositions can be used in sweet systems (i.e., systems with a relatively high concentration of carbon dioxide) or in systems with sour conditions (i.e., relatively high concentration of hydrogen sulfide). The compositions are useful in a wide range of climates and under a wide range of

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9/40 process conditions (eg 0 ° C to 200 ° C), where other available cleaning / corrosion inhibitor compositions fail.

[0019] The disclosed compositions comprise an iron sulfide dissolver comprising allic acid, altaric acid, altric acid, altronic acid, arabinic acid, arabinonic acid, dihomocitric acid, fruturonic acid, fuconic acid, galactonic acid, galactonic acid, galacturonic acid, glucaric acid, glycoheptonic acid, gluconic acid, glucuronic acid, gulonic acid, homocitric acid, homoisocitric acid, idaric acid, idonic acid, iduronic acid, isocitric acid, mannaric acid, mannonic acid, octulosonic acid, ramonic acid, ribonic acid, tagaturonic acid , xylonic acid or xyluronic acid, or a salt of any of these acids or a derivative of any of these; acids or their salts, or a combination thereof, preferably gluconic acid or a salt thereof, gluconic acid or a salt thereof, or a combination thereof, and most preferably gluconic acid, a salt thereof or a combination thereof. The iron sulphide dissolver can inhibit the formation of iron sulphide or dissolve the iron sulphide.

[0020] Suitable salts of the iron sulfide dissolver include alkali metal or alkaline earth metal salts, such as sodium, potassium, lithium, magnesium, calcium or cesium salts.

[0021] Without being bound by any particular theory, it is believed that the unexpected and superior cleaning performance of the disclosed compositions results from the dissolution of iron sulfide in the treated surfaces (for example, inside of the piping, dirty production equipment). The iron sulfide dissolver, in addition to cleaning performance, can act as a corrosion inhibitor and is more compatible with steel pipelines and equipment such as mild steel than the iron sulfide dispersants used in oilfield applications.

[0022] The compositions can provide protection against corrosion and

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10/40 a cleaning effect for applications related to the production, transport, storage and separation of crude oil and natural gas. In particular, the compositions can improve production in an oil and / or gas application by reducing the corrosion rate and / or removing hydrocarbon deposits (eg, schmoo) from metal or mineral surfaces in contact with a fluid in oil and oil applications. gas. The compositions can improve oil and gas production by keeping surface installation equipment, piping, injection piping inside a well and infrastructure, and porous throats around an injector, clean, to accept an optimum volume of water. The compositions can be used in continuous and / or batch dosing to clean process equipment that has a tendency to accumulate deposits.

[0023] The compositions can provide protection greater than or equal to 90, 95, 96, 97, 98, 99 or 100% of corrosion. The compositions can provide at least 98% corrosion protection after 12 hours, at least 98% corrosion protection after 18 hours and / or at least 98% corrosion protection after 20 hours for a carbon steel working electrode in a bubble test, the test being characterized by a test temperature of about 80 ° C; a liquid medium saturated with carbon dioxide of 10% crude field oil and 90% synthetic brine; and a 10 ppm inhibitor dosage based on total fluids.

[0024] The compositions disclosed herein may include a corrosion inhibiting component consisting of one or more corrosion inhibitors. The corrosion inhibitor (s) may be present in an amount of from about 5% by weight to about 95% by weight about 10% by weight to about 50% by weight or about 15% by weight to about 30% by weight based on the weight of the composition. The corrosion inhibitor (s) may constitute 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 , 23, 24, 25, 26, 27, 28, 29, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 or 95% in

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11/40 weight of the cleaning / corrosion inhibiting composition, based on the total weight of the composition. Preferably, the compositions comprise about 20 to about 30% by weight of the corrosion inhibitor (s), based on the total weight of the composition.

[0025] Suitable corrosion inhibitors include, but are not limited to, quaternary alkyl, hydroxyalkyl, alkylaryl, arylalkyl or arylamine salts; aromatic mono- or polycyclic amine salts; imidazoline derivatives; mono-, di- or trialkyl or alkylaryl phosphate esters; hydroxylamine phosphate esters; polyol phosphate esters; and monomeric or oligomeric fatty acids.

[0026] The corrosion inhibiting component may comprise an imidazoline. Imidazoline can be, for example, diamine-derived imidazoline, such as ethylenediamine (EDA), diethylene triamine (DETA), triethylene tetraamine (TETA) etc. and a long-chain fatty acid such as resin fatty acid (TOFA). The imidazoline can be an imidazoline of Formula (I) or an imidazoline derivative. Representative imidazoline derivatives include an imidazoline compound of Formula (II) or a bisquatized compound of Formula (III). Suitable imidazolines include those of Formula (I):

(I) where R ¹⁰ is a C1-C20 alkyl or C1-10 alkoxyalkyl group; R ¹¹ is hydrogen, Ci-Có alkyl, Ci-Có hydroxyalkyl or Ci-Có arylalkyl; and R ¹² and R ¹³ are independently hydrogen or a C ₆ -C ₆ alkyl group. Preferably, imidazoline includes an R ¹⁰ which is the typical alkyl mixture in

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12/40 resin fatty acid (TOFA), and R ¹¹ , R ¹² and R ¹³ are each hydrogen.

[0027] The corrosion inhibiting component may include an imidazolinium compound of Formula (II):

R ¹⁴ (Π) where R ¹⁰ is a C1-C20 alkyl group or a C1-10 alkoxyalkyl; R ¹¹ and R ¹⁴ are independently hydrogen, C 1 -C ₆ alkyl, C ₁ -C ₆ hydroxyalkyl or C 1 -C arylalkyl; R ¹² and R ¹³ are, independently, hydrogen or a C 1 -C 6 alkyl group; and X 'is a halide (such as chloride, bromide or iodide), carbonate, sulfonate, phosphate or the anion of an organic carboxylic acid (such as acetate). Preferably, the imidazoline compound includes 1-benzyl-1- (2-hydroxyethyl) -2-resin-2imidazolinium chloride.

[0028] The corrosion inhibitor can comprise a bisquatemized compound with the formula (III):

Λ2

R1 / O

J ^R 3) n II

(III) where:

R1 and R2 are each, independently, alkyl or alkenyl of unsubstituted branched chain or ring, having from 1 to about 29 carbon atoms; alkyl or alkenyl, chain, ring or branched, partially or

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13/40 completely oxygenated, sulfurized and / or phosphorylated, having from 1 to about 29 carbon atoms; or a combination of these;

R ₃ and R 4 are each, independently, alkylene or alkenylene of unsubstituted branched chain or ring, having from 1 to about 29 carbon atoms; alkylene or alkenylene, chain, ring or branched, partially or completely oxygenated, sulfurized and / or phosphorylated, having from 1 to about 29 carbon atoms; or a combination of these;

Li and L ₂ are each independently absent or are H, COOH, -SO ₃ H, -PO ₃ H ₂ , -COOR5, -CONH ₂ , -CONHR5, or -CON (R ₅ ) ₂ ;

Rs each independently represents a branched or unbranched alkyl group, aryl, alkylaryl, alkylheteroaryl, cycloalkyl, or heteroaryl group having from 1 to about 10 carbon atoms;

n is 0 or 1, and when n is 0, L ₂ is absent or is H;

x is from 1 to about 10; and y is from 1 to approximately 5.

[0029] Preferably, R and R ₂ are each independently C ₆ -C ₂₂ alkyl, C ₂ -C 8 alkyl, C ₂ Cis alkyl, C16-C18 alkyl or a combination thereof; R ₃ and R 4 are C 1 -C 10 alkylene, C ₂ -C alkylene, C ₂ C alkylene or C ₂ -C ₃ alkylene; n is 0 or 1; x is 2; y is 1; R ₃ and R4 are -C ₂ H _2; Li is -COOH, SO ₃ H or -PO ₃ H _2; and L ₂ is absent, H, -COOH, -SO ₃ H or -PO ₃ H ₂ . For example Ri and _R2 may be derived from a mixture of resin and fatty acids are predominantly mixture of Cn and Cn _{3 33} i or can be C16-C18 alkyl; R ₃ and R4 can be C ₂ -C ₃ alkylene, such as -C ₂ H _2; n is 1 and L ₂ represents -COOH or n is 0 and L ₂ is absent or H; x is 2; y is 1; R ₃ and R4 are -C ₂ H _2; and Li is -COOH.

[0030] It should be understood that the number of carbon atoms specified for each group of formula (III) refers to the main chain of

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14/40 carbon atoms and does not include carbon atoms that can be contributed by substituents.

[0031] The corrosion inhibitor may include a bisquatized imidazoline compound having formula (III) wherein R1 and R2 are each independently C6-C22 alkyl, C8-C20 alkyl, C12-C18 alkyl, or Ci6Ci8 alkyl or a combination thereof; R4 is C1-C10 alkylene, C2-C8 alkylene, C2 C6 alkylene, or C2-C3 alkylene; xé2; yél; néO; Lié -COOH, -SO3H ,, or PO3H2; and L2 is absent or is H. Preferably, a bisquaternary compound has formula (III) in which R1 and R2 are each independently C16-C18 alkyl; R4 is -C2H2 -; xé2; yél; néO; LiéCOOH, -SO3H or -PO3H2 and L2 is absent or is H.

[0032] The imidazoline and / or imidazoline compound can comprise 0 to 100% by weight, about 10% to 60% by weight, or from about 30% by weight to 45% by weight of the corrosion inhibiting component, based on weight. corrosion inhibiting component. Preferably, the imidazoline and / or imidazoline compound can constitute about 30 to 40% by weight of the corrosion inhibiting component, based on the total weight of the corrosion inhibiting component.

[0033] The corrosion inhibitor can be a quaternary ammonium compound of formula (IV):

R ₂ x®

I ®

R -, ----- N ----- R ₃ r ₄ (IV)

R1, R2, and R3 are, independently, C1 to C20, alkyl, R4 is methyl or benzyl and X is a halide or methosulfate.

[0034] Quaternary alkyl, hydroxyalkyl, alkylaryl, arylalkyl or arylamine salts include those quaternary alkylaryl, arylalkyl and arylamine salts of the formula [N ⁺ R ^5a R ^6a R ^7a R ^8a ] [X] where

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15/40

^R5a ROA, _and P8A p7a _{con m} tg _{one to} 18 carbon atoms and X is Cl, Br or I. In the quaternary salts, R ^5a, R ^6a, R ^7a and R ^8a may be, each independently, selected from a group consisting of alkyl (for example, C 1 -Cis alkyl), hydroxyalkyl (for example, C 1 -Cis hydroalkyl) and arylalkyl (for example, benzyl). The mono or polycyclic aromatic amine salt with an alkyl or alkylaryl halide includes salts of the formula [N ⁺ R ^5a R ^6a R ^7a R ^8a ] [X] where R ^5a , R ^6a , R ^7a and R ^8a contain a 18 carbon atoms and at least one aryl group, and X is Cl, Br or I.

[0035] Suitable quaternary ammonium salts include, but are not limited to, a tetramethylammonium salt, a tetraethylammonium salt, a tetrapropylammonium salt, a tetrabutylammonium salt, a tetrahexylammonium salt, a tetraoctylamonium salt, a benzyltrimethylammonium salt , a benzyltriethylammonium salt, a phenyltrimethylammonium salt, a phenyltriethylammonium salt, a cetylbenzyldimethylammonium salt, a hexadecyltrimethylammonium salt, a quaternary ammonium salt of dimethylalkylbenzyla quaternary ammonium or monomethylbenzyl quaternary ammonium salt wherein the alkyl group has about 6 to about 24 carbon atoms, about 10 to about 18 carbon atoms, or about 12 to about 16 carbon atoms. The quaternary ammonium salt can be a benzyltrialkyl quaternary ammonium salt, a benzyltriethanolamine quaternary ammonium salt or a benzyl dimethylaminoethanolamine quaternary ammonium salt.

[0036] Quaternary ammonium salts can comprise 0 to 100% by weight, about 20% to 80% by weight, or about 50 to 65% by weight of the corrosion inhibiting component, based on the total weight of the inhibiting component of corrosion. Preferably, the quaternary ammonium salt constitutes about 50 to 60% by weight of the corrosion inhibiting component, based on the total weight of the corrosion inhibiting component.

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16/40 [0037] The corrosion inhibiting component may comprise a pyridinium salt such as those represented by Formula (V):

| X ^o

R ⁹ (V) where R ⁹ is an alkyl group, an aryl group or an arylalkyl group, wherein said alkyl groups have from 1 to about 18 carbon atoms and X is a halide such as chloride, bromine or iodine . Among these compounds are the alkylpyridinium salts and the quaternary benzyl alkylpyridinium. Exemplary compounds include methylpyridinium chloride, ethylpyridinium chloride, propylpyridinium chloride, butylpyridinium chloride, octylpyridinium chloride, decylpyridinium chloride, laurylpyridinium chloride, cetylpyridinium chloride, benzylpyridinium chloride and an alkylen chloride in preference to alkylen chloride. is a Ci-Có hydrocarbyl group. Preferably, the pyridinium compound includes benzylpyridinium chloride.

[0038] The pyridinium salt can constitute 0% by weight to 100% by weight, about 10% to 60% by weight, or about 30 to 40% by weight of the corrosion inhibiting component, based on the total weight of the component. corrosion inhibitor.

[0039] Corrosion inhibiting components may include additional corrosion inhibitors such as phosphate esters, monomeric or oligomeric fatty acids or alkoxylated amines.

[0040] The corrosion inhibiting component may comprise a phosphate ester. Suitable mono-, di- and trialkyl esters, as well as alkylaryl phosphate esters and mono, di and triethanolamine phosphate esters typically contain between 1 and about 18 carbon atoms.

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17/40

Preferred mono, di and trialkyl phosphate esters, alkylaryl or arylalkyl phosphate esters are those prepared by reacting a C3-C18 aliphatic alcohol with phosphorus pentoxide. The phosphate intermediate exchanges its ester groups for triethyl phosphate, producing a wider distribution of alkyl phosphate esters.

[0041] Alternatively, the phosphate ester can be prepared by mixing by adding with an alkyl diester, a mixture of low molecular weight alkyl alcohols or diols. Low molecular weight alkyl alcohols or diols preferably include C0 to C10 alcohols or diols. In addition, polyol phosphate esters and salts thereof which contain one or more 2-hydroxyethyl groups and hydroxylamine phosphate esters obtained by reacting polyphosphoric acid or phosphorus pentoxide with hydroxylamines such as diethanolamine or triethanolamine are preferred.

[0042] The corrosion inhibiting component may include a monomeric or oligomeric fatty acid. Preferred monomeric or oligomeric fatty acids are C14-C22 saturated or unsaturated fatty acids, as well as products of dimers, trimers and oligomers products obtained by polymerizing one or more of such fatty acids.

[0043] The corrosion inhibiting component may comprise an alkoxylated amine. The alkoxylated amine can be an ethoxylated alkylamine. The alkoxylated amine can be an ethoxylated tallow amine. The alkoxylated amine can constitute 0% by weight to 100% by weight, about 10% to 60% by weight, or about 20 to 30% by weight of the corrosion inhibiting component, based on the total weight of the corrosion inhibiting component.

[0044] Preferably, the corrosion inhibitor comprises the quaternary ammonium salt and the bisquaternized compound of Formula (III).

[0045] The compositions disclosed herein may include a solvent. The solvent can be present in an amount of 5 wt% to about 95 wt%, about 20 wt% to about 80 wt%, or about

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18/40

40% by weight to about 60% by weight based on the total weight of the composition. The solvent can make up about 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 or 95% by weight of the composition.

[0046] Suitable solvents include, but are not limited to, alcohols, hydrocarbons, ketones, ethers, alkylene glycols, glycolic ethers, amides, nitriles, sulfoxides, esters and water. The solvent can be water, isopropanol, methanol, ethanol, 2-ethylhexanol, heavy aromatic naphtha, toluene, ethylene glycol, ethylene glycol monobutyl ether (EGMBE), diethylene glycol monoethyl ether or xylene. Representative polar solvents suitable for formulation with the composition include water, brine, seawater, alcohols (including straight or branched aliphatics, such as methanol, ethanol, propanol, isopropanol, butanol, 2-ethylhexanol, hexanol, octanol, decanol , 2-butoxyethanol, etc.), alkylene glycols (methylene glycol, ethylene glycol,

1,2-propylene glycol, 1,3-propylene glycol, etc.) ether glycols (diethylene glycol monomethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, etc.), ketones (cyclohexanone, diisobutyl ketone), ethers (diethyl ether, etc.) alkylene carbonate (propylene carbonate, etc.), N-methylpyrrolidinone (NMP), Ν, Ν-dimethylformamide, a polyol (glycerin, etc.) and the like. Representative non-polar solvents suitable for formulation with the composition include aliphatic hydrocarbons, such as pentane, hexane, cyclohexane, methylcyclohexane, heptane, decane, dodecane, diesel and the like; aromatic hydrocarbons, such as toluene, xylene, heavy aromatic naphtha, derivatives of fatty acids (acids, esters, amides) and the like.

[0047] The solvent can be a solvent compatible with an arctic environment, such as methanol, ethanol, ethylene glycol or glycerin, which improves the antifreeze properties of the composition. This solvent is typically present in an amount of about 5 to about 15% by weight, preferably about 10% by weight, based on the total weight of the

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19/40 composition, to have an antifreeze effect.

[0048] The compositions disclosed herein may include a sulfur-containing compound. The sulfur-containing compound can be present in an amount of about 1 wt% to about 20 wt%, about 1 wt% to about 10 wt%, or about 1 to about 5 wt% based on the total weight of the composition. The sulfur-containing compound may constitute about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20% by weight of the cleaning / corrosion inhibiting composition, based on the total weight of the composition.

Suitable sulfur-containing compounds include compounds that increase the inhibiting performance of cleaning agents and / or corrosion of the composition, such as synergists. The sulfur-containing compound may include, but is not limited to, thioglycolic acid, 3,3'ditiodipropionic acid, thiourea, 2-mercaptoethanol, L-cysteine, tert-butyl mercaptan, sodium thiosulfate, ammonium thiosulfate, sodium thiocyanate, ammonium thiocyanate, sodium metabisulfite, or a combination thereof. Preferably, the sulfur-containing compound is 2-mercaptoethanol.

[0050] The compositions can also optionally include one or more additives. Suitable additives include, but are not limited to, asphaltene inhibitors, paraffin inhibitors, fouling inhibitors, emulsifiers, water clarifiers, dispersants, emulsion breakers, hydrogen sulfide scavengers, gas hydrate inhibitors, biocides, pH modifiers and surfactants.

The composition may comprise from about 0.1 to 10% by weight, from about 0.1 to 5% by weight, from about 0.5 to 4% by weight, of an asphaltene inhibitor, with based on the total weight of the composition. Suitable asphaltene inhibitors include, but are not limited to, aliphatic sulfonic acids; alkylaryl sulfonic acids; aryl sulfonates; lignosulfonates; alkylphenol / aldehyde resins and similar sulfonated resins; polyolefin esters;

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20/40 polyolefin imides; polyolefin esters with alkyl, alkylenophenyl or alkylenopyridyl functional groups; polyolefin amides; polyolefin amides with alkyl, alkylenophenyl or alkylenopyridyl functional groups; polyolefin imides with alkyl, alkylenophenyl or alkylenopyridyl functional groups; alkenyl / vinylpyrrolidone copolymers; graft polymers of polyolefins with maleic anhydride or vinylimidazole; hyper-branched polyester amides; polyalkoxylated asphaltenes, amphoteric fatty acids, salts of alkyl succinates, sorbitan monooleate and polyisobutylene succinic anhydride.

[0052] The composition may comprise from about 0.1 to 10% by weight, from about 0.1 to 5% by weight, from about 0.5 to 4% by weight, of a paraffin inhibitor, with based on the total weight of the composition. Suitable paraffin inhibitors include, but are not limited to, paraffin crystal modifiers and dispersant / crystal modifier combinations. Suitable paraffin crystal modifiers include, but are not limited to, alkyl acrylate copolymers, vinyl acrylate copolymer copolymers, ethylene vinyl acetate copolymers, maleic anhydride ester copolymers, branched polyethylenes, naphthalene, anthracene, microcrystalline wax and / or astalaltenos . Suitable dispersants include, but are not limited to, dodecyl benzene sulfonate, oxyalkylated alkylphenols and oxyalkylated alkylphenolic resins.

[0053] The composition can comprise from about 0.1 to 20% by weight, from about 0.5 to 10% by weight, from about 1 to 10% by weight,% of a scale inhibitor, based on in the total weight of the composition. Suitable scale inhibitors include, but are not limited to, phosphates, phosphate esters, phosphoric acids, phosphonates, phosphonic acids, polyacrylamides, acrylamidomethyl propanesulfonate / acrylic acid (AMPS / AA), phosphine maleic copolymer (PHOS / MA) and s of a polymalleic acid / acrylic acid / acrylamidomethyl propanesulfonate terpolymer (PMA / AMPS).

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The composition may comprise from about 0.1 to 10% by weight, from about 0.5 to 5% by weight, from about 0.5 to 4% by weight, of an emulsifier, based on the total weight of the composition. Suitable emulsifiers include, but are not limited to, salts of carboxylic acids, products of acylation reactions between carboxylic acids or carboxylic anhydrides and amines, and derivatives of alkyl, acyl and amide saccharides (alkyl saccharide emulsifiers).

[0055] The composition may comprise from about 0.1 to 10% by weight, from about 0.5 to 5% by weight, from about 0.5 to 4% by weight, of a water clarifier, with based on the total weight of the composition. Suitable water clarifiers include, but are not limited to, inorganic metal salts, such as alum, aluminum chloride and aluminum hydrochloride, or organic polymers, such as acrylic acid-based polymers, acrylamide-based polymers, polymerized amines, alkanolamines, thiocarbamates and cationic polymers, such as diallyldimethylammonium chloride (DADMAC).

The composition may comprise from about 0.1 to 10% by weight, from about 0.5 to 5% by weight, from about 0.5 to 4% by weight, of a dispersant, based on total weight of the composition. Suitable dispersants include, but are not limited to, aliphatic phosphonic acids with 2 to 50 carbons, such as hydroxyethyldiphosphonic acid and aminoalkylphosphonic acids, for example, polyamine methylene phosphonates with 2 to 10 N atoms, for example, each carrying at least one group of methylenephosphonic acid; examples of the latter are ethylenediamine tetra (methylenephosphonate), diethylenetriamine penta (methylenephosphonate) and triamine- and tetramine-polymethylene phosphonates with 2 to 4 methylene groups between each N atom, at least 2 of the number of methylene groups in each phosphonate being different. Other suitable dispersing agents include lignin or lignin derivatives, such as lignosulfonate and naphthalenesulfonic acid and derivatives.

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The composition may comprise from about 0.1 to 10% by weight, from about 0.5 to 5% by weight, from about 0.5 to 4% by weight, of a breaker of emulsion, based on the total weight of the composition. Suitable emulsion breakers include, but are not limited to, dodecylbenzylsulfonic acid (DDBSA), the sodium salt of xylene sulfonic acid (NAXSA), epoxylated and propoxylated compounds, cationic and non-ionic anionic surfactants, and resins, such as phenolic resins and epoxide.

[0058] The composition may comprise from about 0.5 to 20% by weight, from about 1 to 15% by weight, from about 1 to 10% by weight, of an additional hydrogen sulfide scavenger, based on in the total weight of the composition. Suitable additional hydrogen sulfide sequestrants include, but are not limited to, oxidants (eg, inorganic peroxides, such as sodium peroxide or chlorine dioxide), aldehydes (eg, 1 to 10 carbons, such as formaldehyde, glyoxal, glutaraldehyde , acrolein or methacrolein, triazines (e.g. monoethanolamine triazine, monomethylamine triazine and multiple amine triazines or mixtures thereof).

[0059] The composition can comprise from about 0.1 to 25% by weight, from about 0.5 to 20% by weight, from about 1 to 10% by weight, of a gas hydrate inhibitor, with based on the total weight of the anti-corrosion composition. Suitable gas hydrate inhibitors include, but are not limited to, thermodynamic hydrate inhibitors (THI), kinetic hydrate inhibitors (KHI), and anti-agglomerates (AA). Suitable thermodynamic hydrate inhibitors include, but are not limited to, sodium chloride, potassium chloride, calcium chloride, magnesium chloride, sodium bromide, format brines (eg, potassium formate), polyols (such as glucose, sucrose , fructose, maltose, lactose, gluconate, monoethylene glycol, diethylene glycol, triethylene glycol, monopropylene glycol, dipropylene glycol,

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23/40 tripropylene glycols, tetrapropylene glycol, monobutylene glycol, dibutylene glycol, tributylene glycol, glycerol, diglycerol, triglycerol and sugar alcohols (eg sorbitol, mannitol)), methanol, propanol, ethanol, glycol ethers (eg, diethylene glycol) and alkyl or cyclic esters of alcohols (such as ethyl lactate, butyl lactate, methyl ethyl benzoate).

[0060] The composition may comprise from about 0.1 to 25% by weight, from about 0.5 to 20% by weight, from about 1 to 10% by weight, of a kinetic hydrate inhibitor, based on in the total weight of the composition. Suitable kinetic hydrate inhibitors and anti-agglomerates include, but are not limited to, polymers and copolymers, polysaccharides (such as hydroxyethylcellulose (HEC), carboxymethylcellulose (CMC), starch, starch and xanthan derivatives), lactams (such as polyvinylcaprolactam, pyrrillactam, polyvinylcholine, pyrinillatin, polyvinylcholine, polyvinylcholine, polyvinyl (such as polyvinylpyrrolidone of various molecular weights), surfactants (such as fatty acid salts, ethoxylated alcohols, propoxylated alcohols, sorbitan esters, ethoxylated sorbitan esters, fatty acid polyglycerol esters, alkylglycosides, alkylsulphonates, alkylsulphonylsulphonates alkyl ester, aromatic alkyl sulfonates, alkyl betaine, alkyl starch betaines), hydrocarbon based dispersants (such as lignosulfonates, iminodisuccinates, polyaspartates), amino acids and proteins.

[0061] The composition may comprise from about 0.1 to 10% by weight, from about 0.5 to 5% by weight, from about 0.5 to 4% by weight, of a biocide, based on total weight of the composition. Suitable biocides include, but are not limited to, oxidizing and non-oxidizing biocides. Suitable non-oxidizing biocides include, for example, aldehydes (for example, formaldehyde, glutaraldehyde and acrolein), amine-type compounds (for example, quaternary amine compounds and cocodiamine), halogenated compounds (for example, 2-bromo-2-nitropropane -3-diol (Bronopol) and 2-2

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24/40 dibromo-3-nitrilapropionamide (DBNPA)), sulfur compounds (for example, isothiazolone, carbamates and metronidazole), quaternary phosphonium salts (for example, tetracis (hydroxymethyl) phosphonium sulfate (THPS)). Suitable oxidizing biocides include, for example, sodium hypochlorite, trichloroisocyanuric acids, dichloroisocyanuric acid, calcium hypochlorite, lithium hypochlorite, chlorinated hydantoins, stabilized sodium hypobromite, activated sodium bromide, brominated hydantoins, chlorine dioxide, ozone and peroxides.

[0062] The composition may comprise from about 0.1 to 20% by weight, from about 0.5 to 10% by weight, from about 0.5 to 5% by weight of a pH modifier, based in the total weight of the composition. Suitable pH modifiers include, but are not limited to, alkali hydroxides, alkali carbonates, alkali bicarbonates, alkaline earth metal hydroxides, alkaline earth metal carbonates, alkaline earth metal bicarbonates and mixtures or combinations thereof. Exemplary pH modifiers include sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, magnesium oxide and magnesium hydroxide.

[0063] The composition can comprise from about 0.1 to 10% by weight, from about 0.5 to 5% by weight, from about 0.5 to 4% by weight, of a surfactant, based on total weight of the composition. Suitable surfactants include, but are not limited to, anionic surfactants and non-ionic surfactants. Anionic surfactants include alkylaryl sulfonates, olefin sulfonates, paraffin sulfonates, alcohol sulfonates, alcohol ether sulfates, alkyl carboxylates and alkyl ethyl carboxylates, and ethoxylated alkyl and alkyl phosphate esters and monoalkyl sulfosuccinates and sulfosuccinylates and monoalkyl dialkyls. Nonionic surfactants include alcohol alkoxylates, alkylphenol alkoxylates, ethylene block copolymers, oxides of

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25/40 propylene and butylene, alkyldimethylamine oxides, alkyl-bis (2hydroxyethyl) amine oxides, alkylamidopropyldimethylamine oxides, alkylamidopropyl-bis (2-hydroxyethyl) amines, alkyl polyglycosides, polyalkoxylated oxides, and polyoxyalkylated esters; and alkyl polyethylene glycol esters and diesters. Also included are betaines and sultans, amphoteric surfactants, such as alkyl amphocytophosphate ankylates, alkyl amphopropionates and amphodipropionates and alkyliminodiproprionate.

[0064] The surfactant can be composed of quaternary ammonium, an amine oxide, an ionic or non-ionic surfactant or any combination thereof. Suitable quaternary amine compounds include, but are not limited to, alkyl benzylammonium chloride; benzylcocoalkyl chloride (C1 Cl2) dimethylammonium; dicocoalkyl chloride (C12 -C18) dimethylammonium; dimethylammonium chloride dizbaceous; di (hydrogenated tallow alkyl) dimethyl quaternary ammonium chloride; bis (2-hydroxyethyl cocoalkyl / Cn-Cis) quaternary ammonium chloride; dimethyl (2-ethyl) sebaceous methyl ammonium sulfate; n-dodecylbenzyldimethylammonium chloride; noctadecylbenzyldimethylammonium chloride; n-dodecyltrimethylammonium sulfate; alkyl alkyl trimethylammonium chloride; and methyl (2-ethylhexyl) dimethyl quaternary ammonium sulfate.

[0065] Compositions made according to the invention may also include additional functional agents or additives that provide a beneficial property. The amount of an additional agent or additive, when present, will vary according to the particular composition to be manufactured and its intended use as an individual skilled in the art will observe.

[0066] The compositions of the invention can be prepared by combining the iron sulfide dissolver with a solvent to form a solution. The solution can be added one or more inhibitors of

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26/40 additional corrosion, sulfur-containing compounds and / or solvents, and any other additives.

[0067] The compositions of the invention can be used to inhibit corrosion and / or remove hydrocarbon deposits (e.g., schmoo) in oil and gas applications. The compositions of the invention can be used in any industry where it is desirable to inhibit corrosion and / or remove hydrocarbon deposits from a surface.

[0068] The method comprises placing any of the compositions described in this document or the iron sulfide dissolver in contact with the metal surface to reduce, inhibit or prevent corrosion and / or remove hydrocarbon deposits from the metal surface.

[0069] The compositions can be used to inhibit corrosion and / or remove hydrocarbon deposits by treating a gas or liquid stream with an effective amount of a composition of the invention, as described herein.

[0070] The cleaning / corrosion inhibitor compositions can be used in water systems, condensate / oil / gas systems or any combination thereof. For example, compositions can be used to control fouling on surfaces of heat exchangers.

[0071] The compositions can be applied to a gas or liquid produced or used in the production, transportation, storage and / or separation of crude oil or natural gas.

[0072] The compositions can be applied to a gas stream used or produced in a coal burning process, such as a coal burning power plant.

[0073] The compositions can be applied to a gas or liquid produced or used in a wastewater process, a farm, a slaughterhouse, a landfill, an urban wastewater plant, a process of

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27/40 coking coal or a biofuel process.

[0074] A fluid to which compounds and compositions can be introduced can be an aqueous medium. The aqueous medium can comprise water, gas and, optionally, liquid hydrocarbon.

[0075] A fluid to which compounds and compositions can be introduced can be a liquid hydrocarbon. The liquid hydrocarbon can be any type of liquid hydrocarbon including, but not limited to, crude oil, heavy oil, processed residual oil, bituminous oil, coking oil, coking oil, coking fluid catalytic cracker, diesel, naphtha feed, catalytic cracking of fluid, diesel oil, fuel oil, jet fuel, gasoline and kerosene.

[0076] The fluid or gas can be a refined hydrocarbon product.

[0077] A fluid or gas treated with a composition can be at any selected temperature, such as room temperature or an elevated temperature. The fluid (for example, liquid hydrocarbon) or gas can be at a temperature of about 40 ° C to about 250 ° C. The fluid or gas can be at a temperature of -50 ° C to 300 ° C, 0 ° C to 200 ° C, 10 ° C to 100 ° C, or 20 ° C to 90 ° C. The fluid or gas can be at a temperature of 20 ° C, -15 ° C, -10 ° C, -5 ° C or 0 ° C. The fluid or gas can be found in an arctic environment, and can have a temperature and salinity typical of that environment.

[0078] The compositions of the invention can be added to a fluid at various levels of water cut. For example, the water cut can be from 0% to 100% by volume / volume (in v / v), from 1% to 80% in v / v or from 1% to 60% in v / v. The fluid can be an aqueous medium that contains various levels of salinity. The fluid can have a salinity of 0% to 25%, about 1% to 24% or about 10% to 25% by weight / weight (w / w) of total dissolved solids (TDS).

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[0079] The fluid or gas into which the compositions of the invention are introduced may be contained and / or exposed to many different types of apparatus. For example, the fluid or gas may be contained in an apparatus that transports fluid or gas from one point to another, such as an oil and / or gas pipeline. The apparatus may be part of an oil and / or gas refinery, such as a pipe, a separation vessel, a dehydration unit or a gas line. The compositions can be introduced in large diameter flow lines from about 2.54 cm (1 inch) to about 1.21 m (4 feet) in diameter, small collection lines, small flow lines and collectors. The fluid may be contained and / or exposed to an apparatus used for oil extraction and / or production, such as a wellhead. The device may be part of a coal-fired power plant. The apparatus may be a scrubber (for example, a wet exhaust gas desulfurizer, a dry spray absorber, a dry sorbent injector, a spray tower, a contact tower or bubble, or the like). The apparatus can be a cargo vessel, a storage vessel, a holding tank or a pipe connecting the tanks, vessels or processing units.

[0080] The surface may be a metal surface, such as carbon steel pipe or flue or mild steel pipe or flue. [0081] The compositions of the invention can be introduced into a fluid or gas by any appropriate method to ensure dispersion by the fluid or gas.

[0082] The composition can be added to the hydrocarbon fluid before the hydrocarbon fluid comes into contact with the surface.

[0083] The composition can be added at one point in a flow line upstream from the point where corrosion prevention and / or removal of schmoo is desired.

[0084] The compositions can be injected with the use of

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29/40 mechanical equipment, such as chemical injection pumps, pipe T-joints, injection accessories, atomizers, deposits and the like.

[0085] The compositions of the invention can be introduced with or without one or more additional polar or non-polar solvents depending on the application and requirements.

[0086] The compositions can be pumped into an oil and / or gas pipeline using an umbilical line. A capillary injection system can be used to deliver the compositions for a selected fluid.

[0087] A fluid to which the compositions can be introduced can be an aqueous medium. The aqueous medium can comprise water, gas and, optionally, liquid hydrocarbon. A fluid to which the compositions can be introduced can be a liquid hydrocarbon.

[0088] The compositions can be introduced into a liquid and mixed.

[0089] The compositions can be injected into a gas stream as an aqueous or non-aqueous solution, mixture or paste.

[0090] The fluid or gas can pass through an absorption tower comprising a composition of the invention.

[0091] The compositions can be applied to a fluid or gas to provide any selected concentration. In practice, the compositions of the invention are typically added to a flow line to provide an effective treatment dose of the described compositions from about 0.01 to about 5,000 ppm. The compositions can be applied to a fluid or gas to provide a concentration of about 1 parts per million (ppm) to about 1,000,000 ppm, about 1 parts per million (ppm) to about 100,000 ppm, or about 10 ppm to about 75,000 ppm. The compositions can be applied to a fluid at a concentration of about 100 ppm to about 10,000 ppm, about 200 ppm to about 8,000 ppm, or about 500 ppm to about 6,000 ppm. The compositions can be applied to a fluid or gas

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30/40 to provide a concentration of 10 ppm, 20 ppm, 100 ppm, 200 ppm, 500 ppm or 1,000 ppm. Each system can have its own requirements, and the effective amount of a composition to sufficiently reduce the corrosion rate and / or remove schmoo may vary with the system in which it is used.

[0092] The compositions can be applied continuously, in batch, or a combination of these. For example, doses of the composition can be continuous to prevent corrosion or intermittent (i.e., batch treatment) to remove hydrocarbon deposits. Composition doses can be continuous / maintained and / or intermittent to inhibit corrosion and remove deposits. Dosage rates for continuous treatments typically range from about 10 to about 500 ppm, or about 10 to about 200 ppm. Dosage rates for batch treatments typically range from about 10 to about 400,000 ppm, or from about 10 to about 20,000 ppm. The composition can also be applied as a pill to a pipeline, for example, to provide a high dose (for example, 20,000 ppm) of the composition.

[0093] The flow rate of a flow line in which the composition is used can be between 0 to 30.48 m (0 and 100 feet) per second, or between 0.03 to

15.24 m (0.1 and 50 feet) per second. The compositions can be formulated with water to facilitate addition to the flow line.

DEFINITIONS [0094] The term "suitable substituent", as used herein, means a chemically acceptable functional group, preferably a chemical moiety that does not negate the activity of the compounds of the invention. Such suitable substituents include, but are not limited to, halo groups, perfluoroalkyl groups, perfluoroalkoxy groups, alkyl groups, alkenyl groups, alkynyl groups, hydroxyl groups, oxo groups, mercapto groups, alkylthio groups, alkoxy groups, aryl or heteroaryl groups, aryloxy groups or heteroaryloxy, aralkyl or heteroaralkyl groups, aralkoxy groups or

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31/40 heteroaralkoxy, carboxyl groups, heterocyclic groups, cycloalkyl groups, amine groups, alkyl- and dialkylamine groups, carbamoyl groups, alkylcarbonyl groups, alkoxycarbonyl groups, alkylaminocarbonyl groups, carbonyl dialkylamine groups, arylcarbonyl groups, arylsulfonyl groups and arylsulfonyl groups . Those skilled in the art will appreciate that many substituents can be replaced by additional substituents.

[0095] The term "alkyl", as used herein, refers to a straight or branched hydrocarbon radical, preferably having 1 to 32 carbon atoms (i.e., 1, 2, 3, 4, 5, 6, 7 , 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 39, 30, 31 or 32 carbons). The alkyl groups include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, nbutyl, isobutyl, secondary butyl and tertiary butyl. The alkyl groups can be unsubstituted or substituted with one or more suitable substituents, as defined above.

[0096] The term "alkenyl", as used herein, refers to a straight or branched hydrocarbon radical, preferably with 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 , 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 39, 30, 31 or 32 carbons and with one or more carbon-carbon double bonds. Alkenyl groups include, but are not limited to, ethylene, 1-propenyl, 2propenyl (allyl), isopropenyl, 2-methyl-1-propenyl, 1-butenyl and 2-butenyl. Alkenyl groups can be unsubstituted or substituted with one or more suitable substituents, as defined above.

[0097] The term "alkynyl", as used here, refers to a straight or branched hydrocarbon radical, preferably with 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 , 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 39, 30, 31 or 32 carbons and with one or more carbon-carbon triple bonds. Alquinyl groups include, but are not limited to, ethynyl, propynyl and butynyl. Alkynyl groups can be unsubstituted or substituted with one or more suitable substituents, as defined above.

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32/40 [0098] The term "alkoxy", as used here, refers to an alkyl group, as defined herein, attached to the parent molecular moiety through an oxygen atom.

[0099] The term "aryl", as used herein, means monocyclic, bicyclic or tricyclic aromatic radicals such as phenyl, naphthyl, tetrahydronaphthyl, indanyl and the like; optionally substituted by one or more suitable substituents, preferably 1 to 5 suitable substituents, as defined above.

[00100] The term "carbonyl", "(C = O)" or "-C (O) -" (as used in expressions such as alkylcarbonyl, alkyl - (C = O) - or alkoxycarbonyl) refers to the joining of the portion chemistry> C = O to a second portion, such as an alkyl or amino group (i.e., a starch group). Alkoxycarbonylamino (i.e., alkoxy (C = O) —NH—) refers to an alkyl carbamate group. The carbonyl group is also here equivalently defined as (C = O). Alkylcarbonylamino refers to groups as acetamide.

[00101] The term "cycloalkyl", as used herein, refers to a monocyclic, bicyclic or tricyclic carbocyclic radical (for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclopentenyl, cyclohexane , bicycles [2.2.1] heptanyl, bicycles [3.2.1] octanyl and bicycles [5.2.0] nonanyl, etc.); optionally containing 1 or 2 double bonds. Heteroaryl groups can be unsubstituted or substituted by one or more suitable substituents, preferably 1 to 5 suitable substituents, as defined above.

[00102] The term "-eno", when used as a suffix as part of another group, denotes a divalent radical in which a hydrogen atom is removed from each of the two terminal carbons in the group. For example, alkylene denotes a divalent alkyl group, such as methylene (-CH2-) or ethylene (-CH2CH2-). For clarity, adding the suffix -eno is not intended to change the definition of the main word other than by denoting a radical

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33/40 bivalent. Thus, continuing the above example, alkylene denotes an optionally substituted bivalent, linear or branched hydrocarbon radical. [00103] The term "halo" or "halogen", as used in this document, refers to a radical fluoro, chloro, bromo or iodo. Likewise, the term "halide" refers to fluoride, chloride, bromide, iodide or the like.

[00104] The term "heteroaryl", as used in this document, refers to a monocyclic, bicyclic or tricyclic aromatic heterocyclic group that contains one or more heteroatoms selected from O, S and N in the ring (or rings). Heteroaryl groups include, but are not limited to, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, thienyl, furyl, imidazolyl, pyrrolyl, oxazolyl (eg 1,3-oxazolyl, 1,2-oxazolyl), thiazolyl (eg 1,2 -thiazolyl,

1,3-thiazolyl), pyrazolyl, tetrazolyl, triazolyl (eg 1,2,3-triazolyl, 1,2,4-triazolyl), oxadiazolyl (eg 1,2,3-oxadiazolyl), thiadiazolyl (eg example, 1,3,4-thiadiazolyl), quinolyl, isoquinolyl, benzothienyl, benzofuryl and indolyl. Heteroaryl groups can be unsubstituted or substituted by one or more suitable substituents, preferably 1 to 5 suitable substituents, as defined above.

[00105] The term “heterocycle”, as used in this document, refers to a monocyclic, bicyclic or tricyclic group that contains 1 to 4 heteroatoms selected from N, O, S (O) _n , P (O) _n , PR ^X , NH or NR ^X where R ^x is a suitable substituent. Heterocyclic groups optionally contain 1 or 2 double bonds. heterocyclic groups include, but not limited to, azetidinyl, tetrahydrofuranyl, imidazolidinila, pyrrolidinyl, piperidinyl, piperazinyl, oxazolidinila, tiazolidinila, pirazolidinila, tiomorfolinila, tetrahidrotiazinila, tetrahidrotiadiazinila, morfolinola, oxetanila, tetrahidrodiazinila, oxazinila, oxatiazinila, indolinyl, isoindolinila, quinuclidinila, cromanila, isochromanyl and benzoxazinyl. Examples of saturated or partially saturated monocyclic ring systems are

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34/40 tetrahydrofuran-2-yl, tetrahydrofuran-3-yl, imidazolidin-1-yl, imidazolidin-2yl, imidazolidin-4-yl, pyrrolidin-1-yl, pyrrolidin-2-yl, pyrrolidin-3-yl, piperidin -1-yl, piperidin-2-yl, piperidin-3-yl, piperazin-1-yl, piperazin-2-yl, piperazin-3-yl, 1,3-oxazolidin-3-yl, isothiazolidine, 1,3 -thiazolidin-3-yl, 1,2-pyrazolidin-2-yl, 1,3-pyrazolidin-1-yl, thiomorpholinyl, 1,2-tetrahydrothiazin-2ila, 1,3-tetrahydrothiazin-3-yl, tetrahydrothiadiazinyl, morpholinyl, 1 , 2tetrahydrodiazin-2-yl, 1,3-tetrahydrodiazin-1-yl, 1,4-oxazin-2-yl and 1,2,5oxatiazin-4-yl. Heterocyclic groups can be unsubstituted or substituted by one or more suitable substituents, preferably 1 to 3 suitable substituents, as defined above.

[00106] The term "hydroxy", as used here, refers to an OH group.

[00107] The term "oxo", as used here, refers to a double-bonded oxygen radical (= 0), where the bonding partner is a carbon atom. Such a radical can also be thought of as a carbonyl group.

[00108] The term "counterion", as used here, means a halide (e.g., fluoride, chloride, bromide, iodide), a carboxylate anion, as selected from the deprotonation of mineral acid, acrylic acid, acetic acid, methacrylic, glycolic acid, thioglycolic acid, propionic acid, butyric acid and the like or any other anionic constituent that satisfies the charge balance necessary to form a neutral molecule.

[00109] The term “sweetening”, as used here, can refer to a process that removes sulfur species from a gas or liquid. Sulfur species can include hydrogen sulfide and mercaptans.

[00110] The term "water cut", as used here, means the percentage of water in a composition that contains a mixture of oil and water.

[00111] The term “hydrocarbonaceous deposit”, as used here, refers to

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35/40 if any deposit including at least one hydrocarbon constituent and forming on the internal surface of flow lines, pipes, injection lines, well surfaces, storage tanks, process equipment, vessels and the like, and other components in oil and gas applications. These deposits also include "schmoo", which refers to a solid substance, similar to paste or sludge, which adheres to almost any surface with which it comes in contact and is particularly difficult to remove. The deposits that contribute to schmoo may include, for example, sand, clays, sulfur, naphthenic acid salts, corrosion by-products, biomass and other hydrocarbonaceous materials linked together with the oil. These terms are used interchangeably throughout this document.

[00112] The term "TOFA", as used here, refers to a resinous fatty acid that is a distilled product derived from trees and includes a mixture of fatty acids.

[00113] Having described the invention in detail, it will be evident that modifications and variations are possible without departing from the scope of the invention defined in the appended claims.

EXAMPLES [00114] The following non-limiting examples are provided to further illustrate the present invention.

Examples 1 to 15: Cleaning / Corrosion Inhibitor Compositions [00115] Table 1 summarizes the exemplary compositions of the invention. The raw materials are commercially available.

[00116] The compositions in Table 1 can be prepared by adding sodium gluconate to distilled water to form a solution. A mixture of benzyl-dimethyl-Cn-Cis alkyl ammonium chloride, a bisquaternary compound and 2-mercaptoethanol can be combined with the solution, and then another solvent can be added with stirring to form the composition. Compositions can be inspected

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36/40 visually after a period of three weeks to determine whether precipitation, flocculation or phase separation has occurred at room temperature.

[00117] The effect of different solvents was tested in Examples 6 to

11. Each of these examples was prepared with the same amount of iron sulfide dissolver, solvent and corrosion inhibitor / sulfur-containing compound, but the solvent species were varied. The variation in solvents did not impact the stability of the formulation and the observations are reported in Table 1.

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TABLE 1. COMPOSITIONS OF EXAMPLES 1 TO 15 (NT = NOT TESTED)

Component EXAMPLE No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Iron Sulfide Dissolver (% by weight) Sodium Gluconate 5 5 10 10 10 15 15 15 15 15 15 20 25 30 40 Solvent Distilled water 60 60 55 55 50 50 50 50 50 50 50 35 25 20 10 Corrosion Inhibitor / Sulfur Containing Compound (% by weight) C12-C18 alkyl dimethyl benzyl quaternary ammonium chloride; Bisquaternized compound; 2-mercaptoethanol 5 10 15 20 25 25 25 25 25 25 25 30 35 40 45 Solvent (% by weight) Methanol 20 15 10 0 5 0 0 0 15 Ethanol 15 0 0 0 0 0 10 0 5 Isopropanol 25 0 0 0 0 10 0 0 Ethylene glycol 15 0 0 10 5 0 0 0 15 Propylene carbonate 15 0 0 0 0 0 0 10 10 Total 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Test of Stability Room temperature NT NT NT NT Stable (without precipitation, phase separation, flocculation) NT NT NT NT

37/40

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38/40 [00118] The bisquatemized compound in Table 1 has the formula:

RF

wherein Rt is derived from a mixture of resin oil fatty acids and is predominantly a mixture of C17H33 and C17H31. EXAMPLE 16: CORROSIVITY ASSESSMENT VIA BUBBLE TEST [00119] Sodium gluconate was evaluated for corrosion performance compared to THPS using a bubble test procedure. The bubble test simulates areas of low flow where little or no mixing of water and oil occurs. The test was performed using 100% synthetic brine. The brine was placed in boilers and purged with carbon dioxide. The brine was continuously purged with carbon dioxide to saturate the brine before starting the test. After the start of the test, the test cell was covered with carbon dioxide one hour before inserting the electrode and for the duration of the test to maintain saturation. The boilers were stirred at 150 revolutions per minute (rpm) for the duration of the test to maintain thermal equilibrium at 80 ° C. The corrosion rate was measured by Linear Polarization Resistance (LPR) techniques. The working electrode used was carbon steel. The counter and reference electrodes were both made of 1018 carbon steel. The electrodes were all cleaned and polished before testing. Data were collected for four hours before each composition was assayed in its respective cell. The data were collected overnight. The synthetic brine was composed of 5.64 g of CaCl ₂ «2H ₂ O, 7.2 g of MgCl ₂ « 6H ₂ O, 1.32 g of KC1, 0.96 g of Na ₂ SO ₄ , 16.8 g of NaHCOs, 205.8 g of NaCl, 1.08 g of NaBr and 10.8 g of acetic acid in 12 liters of water. The brine had a pH of 5.5

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39/40 [00120] The results of the bubble test are shown in Figure 1, where ppm is parts per million, mpy is mm per year (thousand per year). The corrosivity of sodium gluconate was compared directly to THPS in a brine solution in equivalent doses.

[00121] All boilers that received a dosage of THPS demonstrated an increase in the rate of untreated corrosion. All boilers that received a dose of sodium gluconate showed no change in the corrosion rate or a reduction in the untreated corrosion rate.

EXAMPLE 17: CORROSION PERFORMANCE ASSESSMENT VIA BUBBLE TEST [00122] The effect of sodium gluconate on corrosion performance compared to THPS was assessed using a bubble test procedure as described in Example 16 using the incident material containing THPS as a test formulation and the formulation of Example 8 as a second test formulation. Data were collected for four hours before each composition was assayed in its respective cell. Data were collected overnight after cells were assayed. The results of the bubble test are shown in Figure 2, where ppm is parts per million, mpy is mm per year (thousand per year).

[00123] The boiler that received a dosage of the formulation containing sodium gluconate showed no significant changes in the corrosion rate when compared to the boiler that received a dosage of the corrosion inhibiting formulation in combination with THPS. No additives affected the performance of the corrosion inhibitor in this test.

EXAMPLE 18: IRON SULPHIDE SOLUBILIZATION PERFORMANCE [00124] Aqueous samples kept at 65.5 ° C (150 ° F) were prepared using iron chloride and sodium sulfide to provide

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40/40 an aqueous composition of iron sulfide having about 30 ppm of iron present. Experimental treatments of a commercially available corrosion inhibitor formulation, a sample of the corrosion inhibitor formulation enriched with 25% THPS, and another sample of the corrosion inhibitor formulation enriched with 25% sodium gluconate were then added to the aqueous samples that were subsequently maintained for another 30 minutes. The samples were then filtered using a 0.2 micron filter and the supernatant analyzed for iron by inductively coupled plasma analysis.

[00125] The results are shown in Figure 3, in which the corrosion inhibitor formulation including 25% sodium gluconate was significantly more effective in dissolving iron sulfide than the same formulation including 25% THPS.

[00126] The terms "comprises", "includes", "has", "can", "contains", and the variants of them, as used herein, are intended to be open transitional phrases, terms or words that are not exclude the possibility of additional steps or components. The singular forms “one / one”, “e”, “o / a” and “said / said” include plural references, unless the context clearly indicates otherwise. The present disclosure also contemplates other modalities "that comprise", "consist of" and "essentially consist of" the modalities or elements presented here, whether explicitly established or not.

[00127] In view of this, it will be seen that the various objectives of the invention are achieved and other advantageous results are achieved.

[00128] As several changes could be made in the above compositions and processes, without departing from the scope of the invention, it is intended that all the matter contained in the description above and shown in the attached figures be interpreted as illustrative and not in a limiting sense .

Claims (34)

1. Composition to inhibit corrosion and / or remove hydrocarbon deposits in oil and gas applications, the composition of which is characterized by the fact that it comprises: an iron sulfide dissolver comprising allic acid, altaric acid, altric acid, altronic acid, arabinic acid, arabinonic acid, dihomocitric acid, fruturonic acid, fuconic acid, galactic acid, galactonic acid, galacturonic acid, gluconic acid, gluconic acid, glucoheptonic acid gluconic, glucuronic acid, gulonic acid, homocitric acid, homoisocric acid, idaric acid, idonic acid, iduronic acid, isocitric acid, mannaric acid, mannonic acid, octulosonic acid, ramnonic acid, ribonic acid, tagaturonic acid, xylonic acid or xyluronic acid, or a salt or derivative thereof, or a combination thereof; an organic solvent; and the additional corrosion inhibitor comprising an imidazoline compound, a quaternary ammonium compound, a pyridinium compound or a combination thereof. Composition according to claim 1, characterized in that the iron sulfide dissolver comprises gluconic acid, a salt thereof, or a combination thereof. Composition according to claim 1, characterized in that the iron sulfide dissolver comprises sodium gluconate, ammonium gluconate, potassium gluconate, lithium gluconate, magnesium gluconate, calcium gluconate, cesium gluconate, gluconic acid, sodium glucarate, ammonium glucarate, potassium glucarate, lithium glucarate, magnesium glucarate, calcium glucarate, cesium glucarate, glucaric acid or a combination of these. Composition according to claim 1, characterized Petition 870190050389, of 05/29/2019, p. 50/63 2/10 due to the fact that the iron sulfide dissolver comprises sodium gluconate, ammonium gluconate, potassium gluconate, lithium gluconate, magnesium gluconate, calcium gluconate, cesium gluconate, gluconic acid, or a combination of themselves. Composition according to any one of Claims 1 to 4, characterized in that the organic solvent comprises an alcohol, a hydrocarbon, a ketone, an ether, an alkylene glycol, a glycol ether, an amide, a nitrile , a sulfoxide, an ester, a polyol, or a combination thereof, and the composition optionally comprises water. Composition according to any one of claims 1 to 5, characterized in that the organic solvent comprises methanol, ethanol, propanol, isopropanol, butanol, 2-ethylhexanol, hexanol, octanol, decanol, 2-butoxyethanol, methylene glycol, ethylene glycol, 1,2propylene glycol, 1,3-propylene glycol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, pentane, hexane, cyclohexane, methylcyclohexane, methylcyclohexane , dodecane, diesel, toluene, xylene, heavy aromatic naphtha, cyclohexanone, diisobutyl ketone, diethyl ether, propylene carbonate, Nmethylpyrrolidinone, Ν, Ν-dimethylformamide, glycerin, or a combination thereof. Composition according to claim 6, characterized in that the organic solvent comprises methanol, ethanol, ethylene glycol, glycerin, or a combination thereof. Composition according to any one of Claims 1 to 7, characterized in that the corrosion inhibitor comprises one or more of the following imidazoline compounds: (A) an imidazoline of Formula (I): Petition 870190050389, of 05/29/2019, p. 51/63 3/10 where R ¹⁰ is a C1-C20 alkyl or C1-C20, alkoxyalkyl group; R ¹² and R ¹³ are, independently, hydrogen or a CiCó alkyl group, R ¹¹ and R ^{14 are} independently hydrogen, Ci-Có alkyl, CiCó hydroxyalkyl, or Ci-Có, arylalkyl; and X 'is a halide, carbonate, sulfonate, phosphate or an anion of an organic carboxylic acid; or a tautomer thereof; (B) an imidazolinium salt of formula (II): N (Π) where R ¹⁰ is a C1-C20 alkyl or C1-C20, alkoxyalkyl group; R ¹² and R ¹³ are, independently, hydrogen or a CiCó alkyl group, R ¹¹ and R ^{14 are} independently hydrogen, Ci-Có alkyl, CiCó hydroxyalkyl, or Ci-Có, arylalkyl; and X 'is a halide, carbonate, sulfonate, phosphate or an anion Petition 870190050389, of 05/29/2019, p. 52/63 4/10 of an organic carboxylic acid; or a tautomer thereof; (C) a bisquatized imidazoline compound of Formula (III): Λ2 Ri / O Á ^R 3) n II V- ' ¹ ' 2 / y (III) where: R1 and R2 are each, independently, alkyl or alkenyl of unsubstituted branched chain or ring, having from 1 to about 29 carbon atoms; alkyl or alkenyl, chain, ring or branched, partially or completely oxygenated, sulfurized and / or phosphorylated, having from 1 to about 29 carbon atoms; or a combination of these; R3 and R4 are each, independently, alkylene or alkenylene of unsubstituted branched chain or ring, having from 1 to about 29 carbon atoms; alkylene or alkenylene, chain, ring or branched, partially or completely oxygenated, sulfurized and / or phosphorylated, having from 1 to about 29 carbon atoms; or a combination of these; Fi and F ₂ are each independently absent or are H, COOH, -SO3H, -PO3H2, -COOR5, -CONH2, -CONHR5, or -CON (R ₅ ) ₂ ; R5 each independently represents a branched or unbranched alkyl group, aryl, alkylaryl, alkylheteroaryl, cycloalkyl, or heteroaryl group having from 1 to about 10 carbon atoms; n is 0 or 1, and when n is 0, F ₂ is absent or is H; x is from 1 to about 10; and Petition 870190050389, of 05/29/2019, p. 53/63 5/10 y is from 1 to about 5; or (D) a combination thereof. Composition according to claim 8, characterized in that the corrosion inhibitor comprises the imidazoline of Formula (I) or the imidazolinium salt of formula (II), R ¹⁰ is a typical alkyl mixture in oil fatty acid pine (TOFA), R ¹¹ is benzyl, R ¹² and R ¹³ are each hydrogen, R ¹⁴ is hydroxyethyl, and X ^- represents chloride. 10. Composition according to claim 8, characterized in that the corrosion inhibitor comprises the quatemized bis-imidazoline compound of formula (III), Ri and R2 are derived from a mixture of resin fatty acids and are predominantly a mixture of C17H33 and C17H31, x is 2, y is 1, R3 and R4 are -C2H2-, and Li and L2 are -CO2H, -SO3H, or -PO3H2. Composition according to claim 8, characterized in that the corrosion inhibitor comprises the quatemized bis-imidazoline compound of formula (III), R1 and R2 are each independently C16-C18 alkyl; R4 is -C2H2 _; x is 2; y is 1; n is 0; Li is COOH, -SO3H or -PO3H2 and L2 is absent or H. Composition according to any one of Claims 1 to 11, characterized in that the corrosion inhibitor comprises a pyridinium compound of formula (V): R ⁹ (V) where additional where R ⁹ is an alkyl group, an aryl group or an arylalkyl group, wherein said alkyl groups are from 1 to about 18 Petition 870190050389, of 05/29/2019, p. 54/63 6/10 carbon atoms; and X is a halide. Composition according to claim 12, characterized in that the corrosion inhibitor comprises the pyridinium compound of formula (V), R ⁹ is benzyl, and X ^- represents chloride. Composition according to any one of Claims 1 to 13, characterized in that the corrosion inhibitor comprises the quaternary ammonium salt and the quatemized bis-imidazoline compound of general formula (III). Composition according to any one of claims 1 to 14, characterized in that the corrosion inhibitor comprises the quaternary ammonium salt, and the quaternary ammonium salt comprises a tetramethylammonium salt, a tetraethylammonium salt, a salt of tetrapropylammonium, a tetrabutylammonium salt, a tetrahexylammonium salt, a tetraoctylamonium salt, a benzyltrimethylammonium salt, a benzyltriethylammonium salt, a phenyltrimethylammonium salt, a phenyltriethylammonium salt, a cetylbutylamethylamethylammonium salt quaternary ammonium salt of dimethylalkylbenzyl, a quaternary ammonium salt of monomethyldialkylbenzyl, a quaternary ammonium salt of trimethylbenzyl or a quaternary ammonium salt of trialkylbenzyl, in which the alkyl group has about 6 to about 24 carbon atoms. 16. Composition according to any one of claims 1 to 14, characterized in that the corrosion inhibitor comprises a quaternary ammonium compound of Formula (IV): R ₂ χ ^θ r., ----- n ---- r ₃ R ₄ (IV) Petition 870190050389, of 05/29/2019, p. 55/63 7/10 where Ri, _R2, and R3 are independently Ci to C _2, alkyl, R4 is methyl or benzyl and X is a halide or methosulfate. 17. Composition according to any one of claims 1 to 16, characterized in that the corrosion inhibitor further comprises an alcoholic amine, a phosphate ester, or a monomeric or oligomeric fatty acid. 18. Composition according to claim 17, characterized in that the corrosion inhibitor comprises the alkoxylated amine, and the alkoxylated amine comprises ethoxylated tallow amine. 19. Composition according to any one of claims 1 to 18, characterized in that it contains from about 5% by weight to about 95% by weight of the iron sulfide dissolver, from about 5 to about 95% by weight of the organic solvent, and from about 5 to about 95% by weight of the corrosion inhibitor. Composition according to any one of Claims 1 to 18, characterized in that it contains from about 10% by weight to about 60% by weight of the iron sulfide dissolver, from about 10 to about 60% by weight of the organic solvent, and from about 10 to about 60% by weight of the corrosion inhibitor. 21. Composition according to any one of claims 1 to 18, characterized in that it contains from about 15% by weight to about 30% by weight of the iron sulfide dissolver, from about 20 to about 40% by weight of the organic solvent, and from about 15 to about 30% by weight of the corrosion inhibitor. 22. Composition according to any one of claims 1 to 21, characterized in that it further comprises a sulfur-containing compound of HS- (CH ₂ ) _n OH where n is 2 to 6. 23. Composition according to any of the Petition 870190050389, of 05/29/2019, p. 56/63 8/10 claims 1 to 21, characterized by the fact that it additionally comprises a sulfur-containing compound consisting of thioglycolic acid, 3,3'-dithiodipropionic acid, thiourea, 2-mercaptoethanol, Lcysteine, tert-butyl mercaptane, sodium thiosulfate, ammonium thiosulfate, sodium thiocyanate, ammonium thiocyanate, sodium metabisulfite, or a combination of these. 24. Composition according to any one of claims 1 to 23, characterized in that it further comprises at least one of an asphaltene inhibitor, a paraffin inhibitor, a scale inhibitor, an emulsifier, a water clarifier, a dispersant , an emulsion breaker, a hydrogen sulfide scavenger, a gas hydrate inhibitor, a biocide, a pH modifier and a surfactant. 25. Composition according to any one of claims 1 to 24, characterized in that the iron sulphide dissolver comprises sodium gluconate, the corrosion inhibitor comprises imidazoline and the quantized bis-imidazoline compound, and the solvent comprises methanol , isopropanol, methylene glycol, propylene carbonate or a combination thereof. 26. Composition according to any one of claims 1 to 24, characterized in that the iron sulphide dissolver comprises sodium gluconate, the corrosion inhibitor comprises imidazoline and the quantized bis-imidazoline compound, and the solvent comprises methanol , ethanol, ethylene glycol, glycerin or a combination of these. 27. Method of inhibiting corrosion to a surface and removing hydrocarbon deposits from the surface, the method being characterized by the fact that it comprises the addition of the composition according to any one of claims 1 to 26, or of a dissolver iron sulfide to a fluid that comes into contact with a surface of Petition 870190050389, of 05/29/2019, p. 57/63 9/10 a borehole or equipment used in the production, processing, transport, storage or separation of the fluid to inhibit corrosion and / or remove hydrocarbon deposits from the surface, the iron sulfide dissolver comprising alaric acid, altaric acid, altraric acid, altronic acid, arabinic acid, arabinonic acid, dihomocitric acid, fruturonic acid, fuconic acid, galactonic acid, galactonic acid, galacturonic acid, glucaric acid, glycoheptonic acid, gluconic acid, glucuronic acid, gulonic acid, homocitric acid , idaric acid, idonic acid, iduronic acid, isocitric acid, mannaric acid, mannonic acid, octulosonic acid, ramnonic acid, ribonic acid, tagaturonic acid, xylonic acid or xyluronic acid, or a salt or derivative thereof, or a combination thereof, and the fluid comprises natural gas or hydrocarbon l liquid. 28. Use of the composition as defined in any one of claims 1 to 26, or of an iron sulphide dissolver, characterized by the fact that it is to inhibit corrosion on the surface of a well bore or equipment used in the production, processing, transportation , fluid storage or separation and / or removal of hydrocarbon deposits from the surface, the iron sulphide dissolver comprising allic acid, altaric acid, altric acid, altronic acid, arabinic acid, arabinonic acid, dihomocitric acid, fructuronic acid, fuconic, galactaric acid, galactonic acid, galacturonic acid, glucaric acid, glycoheptonic acid, gluconic acid, glucuronic acid, gulonic acid, homocitric acid, homoisocitric acid, idaric acid, idonic acid, iduronic acid, isocitric acid, mannonic acid, mannonic acid, octulosonic acid, ramnonic acid, rib acid single, tagaturônico acid, or xylonic acid xilurônico acid, or a salt or derivative thereof, or a combination thereof, and the fluid comprises natural gas or hydrocarbon liquid. Petition 870190050389, of 05/29/2019, p. 58/63 10/10 29. Method or use according to claim 27 or 28, characterized in that the composition according to any one of claims 1 to 26, is added to the fluid. 30. Method or use according to claim 27 or 28, characterized in that the iron sulfide dissolver is added to the fluid. 31. Method or use according to claim 30, characterized in that the iron sulfide dissolver comprises gluconic acid, a salt thereof, or a combination thereof. 32. Method or use according to claim 30, characterized in that the iron sulfide dissolver comprises sodium gluconate, ammonium gluconate, potassium gluconate, lithium gluconate, magnesium gluconate, calcium gluconate, cesium, gluconic acid, or a combination thereof. 33. Method or use according to any one of claims 27 to 32, characterized in that the equipment comprises a pipe, a storage container, an injection pipe inside the well, a flow line or an injection line . 34. Method or use according to any one of claims 27 to 33, characterized in that the liquid hydrocarbon comprises crude oil, heavy oil, processed residual oil, bituminous oil, coking oil, diesel, fluid catalytic cracking feed or mud, naphtha, diesel fuel, fuel oil, jet fuel, gasoline or kerosene.